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RF capacitive bar type level meter

RF capacitive bar type level meter adopts a variable capacitor form has the advantages of simple str…

Description：

、產(chǎn)品概述：">

、產(chǎn)品概述：">Productoverview:

ZW-LT702 series RF capacitive bar type level meter 。">The core components of the RF capacitance detection circuit is advanced after 16 bit microcontroller after temperature compensation and precise linear correction, converted into standard electric signal (4~20 mA). 、CANBUS、485通訊協(xié)議進(jìn)行系統(tǒng)組態(tài)

。">The optional HART, CANBUS, 485 communication protocol system configuration. 、“量程"自動(dòng)校準(zhǔn)，以適應(yīng)各種復(fù)雜場(chǎng)所的不同要求

。">The whole series transmitter has self calibration function, the user can through the two buttons to "zero" and "range" automatic calibration, with different requirements to adapt to a variety of complex sites.

、工作原理：">Two, work principle:

，當(dāng)液位變送器投入到被測(cè)液體中某一深度時(shí)，傳感器迎液面受到的壓力公式為：Ρ = ρ .g.H + Po">ZW-LT702 Series <strong> RF capacitive bar type level meter</strong> based on capacitive sensor, when the liquid level transmitter into the measured liquid in a certain depth, the pressure sensor at level formula: P = P.G.H + Po

Type:

P: welcome to the pressure liquid level transmitter

P: the measured liquid density

Po: the surface atmospheric pressure

H: transmitter input liquid depth

，通過(guò)導(dǎo)氣不銹鋼將液體的壓力引入到傳感器的正壓腔

，再將液面上的大氣壓 Po 與傳感器的負(fù)壓腔相連，以抵消傳感器背面的 Po

，使傳感器測(cè)得壓力為：ρ .g.H ，顯然 , 通過(guò)測(cè)取壓力 P

，可以得到液位深度。">At the same time, the pressure of the liquid into the positive pressure chamber through the gas sensor of stainless steel, then vacuum cavity pressure sensor and Po on the surface of the sensor is connected to offset on the back of the Po, the sensors for pressure: P.G.H, obviously, by measuring the pressure of P, can get the level of depth.

、應(yīng)用場(chǎng)合：">Three, application:

、強(qiáng)腐蝕

、易結(jié)晶

、易堵塞等惡劣條件下連續(xù)檢測(cè)各種液體。">ZW-LT702 Series <strong> RF capacitive bar type level meter</strong> suitable for high temperature and high pressure, strong corrosion, easy to crystallize, easy to plug the harsh conditions of continuous detection of various liquids. 、酸堿溶液、和鍋爐的水位,整機(jī)無(wú)任何可動(dòng)或彈性部件，耐沖擊

、安裝方便、可靠性高

、精度高。">The water level measurement for sewage, pH value, and the boiler, the machine without any movable or elastic components, impact resistance, convenient installation, high reliability, high precision. 、投入式、差壓式等液位變送器在各種場(chǎng)合下應(yīng)用

。">Float, can replace the traditional input type, differential pressure type liquid level transmitter used in various occasions.

Four, main features:

、結(jié)構(gòu)簡(jiǎn)單，無(wú)任何可動(dòng)或彈性元部件

，因此可靠性******，維護(hù)量極少

。">1, has the advantages of simple structure, without any movable or elastic components, so high reliability, little maintenance.

、小維修。">Under normal circumstances, do not have regular large, medium and small repair.

、多種信號(hào)輸出

，方便不同系統(tǒng)配置

。">2, a variety of signal output, convenient for different system configuration.

、適用于高溫高壓容器的液位測(cè)量，且測(cè)量值不受被測(cè)液體的溫度

、比重及容器的形狀、壓力影響

。">Measurement of liquid level 3, suitable for high temperature and high pressure container, and the measured value is not affected by the temperature of the fluid to be measured, the proportion and the shape of the container and pressure.

、特別適用于酸

、堿等強(qiáng)腐蝕性液體的測(cè)量

。">4 measurements, especially suitable for acid, alkali and other strong corrosive liquids.

、過(guò)壓、電源極性保護(hù)

。">5, perfect overcurrent and overvoltage protection and power supply polarity protection.

、技術(shù)參數(shù)：">Five, technical parameters:

；">Measuring range: 0.2-20 meters;

Accuracy: + 0.5% + 1%;

；">Probe temperature: -40~+250 degrees;

The transmitter to adapt to the environment temperature: -40~+60 degrees;

；">Allow the pressure: -0.1MPa~2.5MPa;

、堿

、水等非結(jié)晶導(dǎo)電液體

；">Medium: conductivity is not the end of the 10-3S/m of acid and alkali, water and other non conducting liquid crystal;

Power supply voltage: DC12-35V (isolated DC21-27V);

；">The non isolated line, three line: 20mA;

Three wire ends of isolation: <32mA;

；">Three terminal four line: <35mA;

；">Output signal: 4-20mA (0-10mA, 0-20mA);

；">Output protection: 27mA;

、輸出、電源之間隔離耐壓：1000V

；">Voltage isolation between the measurement and the output power: 1000V;

Range adjustment range and zero migration: = + 30%FS;

。">The transmitter body size: Phi 76 * 85.

、液位變送器安裝與調(diào)試：">Six, level transmitter installation and debugging:

，以適應(yīng)不同現(xiàn)場(chǎng)情況

。">1, the liquid level transmitter with a plurality of installation, in order to adapt to different site conditions. ，可選擇墻壁安裝式、水平管架式和垂直管架式等三種安裝方式可選擇

，使您在現(xiàn)場(chǎng)安裝時(shí)得心應(yīng)手。">When the site does not provide M20 * 1.5 internal thread or flange processing facilities, can choose the wall mounted, horizontal tube type and vertical tube type three installation options, make your handy in the on-site installation.

、在測(cè)量流動(dòng)性較大的介質(zhì)時(shí)，為防止傳感器劇烈擺動(dòng)

，用戶(hù)可選用配重附件

，以起到穩(wěn)定傳感器的作用

，加配重時(shí)一定要要把配重物體放入容器底部

，以免拉壞傳感導(dǎo)線(xiàn)。">In 2, medium measuring greater liquidity, in order to prevent the sensor sharp swings the user can choose to play a stable weight attachment, the role of the sensor with weight must be to the weight of objects into the bottom of the container, so as not to pull the bad conductor.

、在現(xiàn)場(chǎng)環(huán)境較惡劣時(shí)，用戶(hù)應(yīng)選用傳感器防護(hù)罩來(lái)保護(hù)傳感器

，以免被異物損壞或影響測(cè)量的準(zhǔn)確性。">3, in the field of environment is bad, the user should choose the sensor protection cover to protect the sensor, the measurement accuracy of the foreign body to avoid being damaged or infected.

、使用桿式液位變送器時(shí)，如果不是金屬容器

，則需要把變送器的外殼用一根導(dǎo)線(xiàn)接入容器的底部

，否則測(cè)量不準(zhǔn)確

。">4, the use of bar type liquid level transmitter, if not the metal containers, you need to put a wire connecting the bottom of the container with the transducer shell, otherwise the measurement is not accurate.

，若需要現(xiàn)場(chǎng)調(diào)整可采取以下方法：">This product has been calibrated at the factory, if you need to adjust the site can take the following methods:

1, the debugging method of intelligent circuit:

，同時(shí)按住“Z"鍵和“S"鍵8秒鐘后同時(shí)松開(kāi)

，再將 “Z" 鍵按一下

，輸出電流自動(dòng)調(diào)整到4mA。">The zero - position when the liquid level is low, at the same time, press the "Z" button and the "S" button for 8 seconds and then release the "Z" button, the output current is automatically adjusted to 4mA.

，同時(shí)按住“Z"鍵和“S"鍵8秒鐘后同時(shí)松開(kāi)，再將“S"鍵按一下

，輸出電流自動(dòng)調(diào)整到20mA。">Full - field adjusting when the liquid level is high, at the same time, press the "Z" button and the "S" button for 8 seconds and then release the "S" button, the output current is automatically adjusted to 20mA.

、采用模擬電路的調(diào)試方法：">2, the debugging method of analog circuit:

，觀察電流表的讀數(shù)接近4mA

。">When the liquid level in the lower limit, the screwdriver is rotated slowly "Z" potentiometer, observe the meter readings close to 4mA.

，用螺絲刀緩慢旋轉(zhuǎn)“S"電位器

，觀察電流表的讀數(shù)接近20mA。">When the liquid level in the cap with a screwdriver, slowly rotating "S" potentiometer, observe the meter readings close to 20mA.

，直到零點(diǎn)和量程都分別為準(zhǔn)確的4mA和20mA。">Repeat 2-3 times, until the zero and span are respectively 4mA and 20mA accurately.

，應(yīng)將變送器的蓋子擰緊。">After adjustment, we should tighten the lid.

、測(cè)量系統(tǒng)：">Seventh, measurement system:

The measurement system is intrinsically safe.

、差壓變送器采用本質(zhì)安全電路，適用于爆炸危險(xiǎn)區(qū)域防爆等級(jí)ExiallCT4-CT6

。">This type of pressure, differential pressure transmitter with intrinsically safe circuit, suitable for explosive hazardous area explosion-proof grade ExiallCT4-CT6.

。">In system loop shielded signal cable must be used, and reliable grounding. ，">The measurement system wiring diagram only to the output signal of 4-20mA and 0-10mA as an example,

、性能穩(wěn)定、體積小

、重量輕，成本低

、設(shè)計(jì)精巧多種結(jié)構(gòu)形式，安裝方便

、無(wú)需支架。">The liquid level transmitter has the advantages of reliable operation, stable performance, small size, light weight, low cost, design a variety of forms, convenient installation, no need to support.

，能夠自動(dòng)消除溫度變化對(duì)傳感器精度的影響。">Electronic circuit board with microprocessor based, can automatically eliminate the influence of temperature change on the sensor accuracy.

，便于本地操作。">This series of products can be equipped with liquid crystal display LCD for local operation.

。">Intelligent output at the same time with HART communication function.

、注意事項(xiàng)：">Eight, matters needing attention:

、凡供貨產(chǎn)品均帶有使用說(shuō)明書(shū)及合格證

，其中有產(chǎn)品編號(hào)、技術(shù)參數(shù)

、出廠日期等，請(qǐng)認(rèn)真核對(duì)

，以免用錯(cuò)。">1, all products are used with delivery instructions and certificate, including product number, technical parameters, the factory date, please carefully check, so wrong.

、接供電電源時(shí)應(yīng)嚴(yán)格按照我公司接線(xiàn)說(shuō)明進(jìn)行連接。">2, the power supply should be strictly in accordance with the instructions of my company wiring connection.

、使用中發(fā)現(xiàn)異常

，應(yīng)關(guān)掉電源

，停止使用

，進(jìn)行檢查

，或直接向我公司技術(shù)部門(mén)。">3, the use of abnormal findings, should turn off the power, stop using, check, or directly to the technical department of our company.

、運(yùn)輸、儲(chǔ)存時(shí)應(yīng)恢復(fù)原包裝

，存放在陰涼、干燥

、通風(fēng)的庫(kù)房?jī)?nèi)。">4, transportation and storage should restore the original packaging and store in a cool, dry and ventilated warehouse.

、選型編碼：">Nine, the selection of encoding:

Type spectrum										Explain
ZW-LT70										Capacitance level meter (Zhongwei control)
category	One									Cable type
	Two									，直接接觸液體介質(zhì)）">Rod type (sensor is installed at the bottom, direct contact with liquid medium)
	Three									Antiseptic
	Four									，不直接接觸介質(zhì)）">The guide rod (pressure sensor mounted on the upper part, is not in direct contact with the media)
Process connection form		T								Mounting bracket
		N								Flange mounting DN40 PN1.0
		K								Tri-Clamp
		Y								Special agreement
Connect the sensor material			One							Three hundred and four	Bar type
			Two							Three hundred and sixteen
			Three							316L
			Four							Ding Qing rubber and PVC Composites	Cable type
			Five							PTFE (polypropylene flange)
Proof way				O						No explosion
				E						Explosion-proof Exia II CT6
Display mode					O					Without on-site instructions
					Z					With current meter indication ( 0-100% Scale)
					X					With on-site display
The weight of						O				Without counterweight
						W				Need to balance
							-.			The installation height ( Mm )
								-.		Measurement of height ( Mm )
									-.	The measured medium density ( G/cm3 )

Ten, design selection and ordering information:

、型號(hào)規(guī)格：ZW-LT700系列電容式物位計(jì)

；">1, specifications: ZW-LT700 series capacitance level meter;

；">2, the measured medium Name: medium density;

、測(cè)量范圍：也可稱(chēng)為公稱(chēng)長(zhǎng)度

；">3, measurement range: also known as nominal length;

、工作壓力：承受壓力

；">4, working pressure: pressure;

；">5, working temperature: measure the temperature of the liquid;

；">6, material requirements: wetted materials;

、螺栓

、螺母

、閥門(mén)

、密封墊圈等配件；">7, supporting the supply of flanges, bolts and nuts, valve, sealing washers and other accessories;

、法蘭標(biāo)準(zhǔn)：法蘭的公稱(chēng)通徑，DN20

、DN25、DN50

、DN80

、DN100等

；">8 standard: flange and flange nominal diameter, DN20, DN25, DN50, DN80, DN100 etc.;

、特殊要求：請(qǐng)?jiān)谟嗀浨霸敿?xì)注明

。">Special requirements: 9, please indicate in detail before ordering.

、售后服務(wù)承諾：">9, customer service service commitment:

，負(fù)責(zé)免費(fèi)維修。">1, I sold by the company level transmitter series product quality problems within 12 months, responsible for free maintenance.

，我公司負(fù)責(zé)免費(fèi)維修或更換。">2, the warranty period if the products of our company have any quality problems, our company is responsible for free repair or replacement.

、質(zhì)保期內(nèi)如用戶(hù)使用不當(dāng)，造成產(chǎn)品損壞

，我公司負(fù)責(zé)維修

，收取損壞部件成本費(fèi)

。">3, the warranty period if the user use undeserved, cause damage to the product, our company is responsible for the maintenance, collect the damaged parts cost.

、質(zhì)保期后產(chǎn)品出現(xiàn)質(zhì)量問(wèn)題

，我公司負(fù)責(zé)維修

，收取損壞部件成本費(fèi)

。">4, after the warranty period of product quality problems, our company is responsible for the maintenance, collect the damaged parts cost.

、如用戶(hù)需我公司現(xiàn)場(chǎng)服務(wù)，對(duì)省內(nèi)用戶(hù)我公司服務(wù)人員12小時(shí)內(nèi)到達(dá)現(xiàn)場(chǎng)

，省外用戶(hù)48小時(shí)內(nèi)到達(dá)現(xiàn)場(chǎng)。">5, if the user needs to our service, our company in the province of the user service personnel arrived at the scene within 12 hours, arrived at the scene 48 hours outside users.

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